2-17

PGND

FB

PHASE

BOOT

VCC

HIP5020

CP+

CP-

HMI

SLOPE

CT

SOFT

GND

VIN

SD

VINF

OVLD

R1

R2

C1

L1

C3

C4

C2

R4

C6

C7

C5

C8

C12

C10

R5

ON/OFF

D1

R6

C9

D2

+

-

FIGURE 1. EXAMPLE APPLICATION CIRCUIT

TABLE 1. EXAMPLE APPLICATION PERFORMANCE PARAMETERS

These characteristics are for the circuit shown in Figure 1 with the components given in Tables 2 and 3.

PARAMETER

CONDITIONS

CIRCUIT 1

HIGH EFFICIENCY

CIRCUIT 2

SMALL SIZE

CIRCUIT 3

LOW COST

UNITS

Input Voltage

- Typical

- Range

3 Li-Ion Cells:

11.1

8.1 to 16

2 Li-Ion Cells:

7.4

5.4 to 12

9 Nicd Cells:

10.8

8.1 to 16

VDC

Switching Frequency

200

±15%

625

±15%

120

±20%

kHz

Output Voltage Variation

Line Regulation

Load Regulation

Initial Setting

3.3

±3.5%

±0.1

±0.3

3.3

±2.2%

±0.1

±0.3

3.3

±3.5%

±0.1

±0.4

V

%

%

Output Voltage Ripple

- Full Load

- Light Load

Bandwidth < 20MHz

18

50

30

80

20

70

mV

Efficiency

- Full load

- Peak

- Light Load

86

92

88

86

89

84

86

90

72

%

%

%

Estimated Circuit Area

Tallest Component

3.5

0.45

2.1

0.24

3.6

0.68

in

Normalized Circuit Cost

Ratio of total circuit cost to Circuit 2

1.1

1

0.75

TABLE 2. COMPONENT SUGGESTIONS FOR EXAMPLE APPLICATION CIRCUITS

COMPONENT

CIRCUIT 1

CIRCUIT 2

CIRCUIT 3

D1

MBR0540

MBR0540

1N4148

D2

MBR0540

Not Used

Not Used

L1

16

5

26

C1

2x - 220

µF, 10V OS-CON

3x - 220

µF, 10V Tantalum

3x - 390

µF, 25V, Aluminum

C2

100

µF, 20V OS-CON

2x - 100

µF, 16V Tantalum

2x - 390

µF, 25V Aluminum

C3

0.1

µF ±20% - Ceramic

0.1

µF ±10% - Ceramic

0.1

µF ±20% - Ceramic

HIP5020